drm/i915: Don't check for NULL before freeing state

This is not necessary after the below commit.

commit a0211bb4
Author: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Date:   Mon Mar 30 14:05:43 2015 +0300

    drm/atomic: Don't try to free a NULL state
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_display.c

@@ -9860,10 +9860,8 @@ bool intel_get_load_detect_pipe(struct drm_connector *connector,
  fail:
 	intel_crtc->new_enabled = crtc->state->enable;
 fail_unlock:
-	if (state) {
 	drm_atomic_state_free(state);
 	state = NULL;
-	}
 
 	if (ret == -EDEADLK) {
 		drm_modeset_backoff(ctx);
@@ -13003,7 +13001,6 @@ static int intel_crtc_set_config(struct drm_mode_set *set)
 	}
 
 out_config:
-	if (state)
 	drm_atomic_state_free(state);
 
 	intel_set_config_free(config);